The shop vac should be sufficient, the only thing it might not get is a main drain (but unless you dive down and plug it, even the stronger shop-vacs work as well as a vac - blower)

I usually blow the lines from the equipment pad, but poolside also works. Any chance you can describe what you plan on doing to winterize the pool ? That way we can make suggestions that will be specific to your pool and set up :-D

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Well I have a 16x36 inground. One skimmer and two returns and a main drain. Sand filter. I was planning on screwing in the shop vac to the threaded hole in the skimmer (I found a adapter) then putting the filter on recirculate to blow out the lines. Plug up each hole with a rubber plug as they get blown out one by one. Then after the main drain is blowing for a while close off the valve to it to air lock. Would this all work?

Well-known member

My 5hp Shop-Vac brand shop-vac won't blow out my main drain but did fine with skimmers and returns. Likewise my Stihl backpack leaf blower. I rigged up a system to put 25lb psi air from my basement air compressor (5hp w/20 gal. tank) into garden hoses and then directly into the filter plumbing. (It's about 150' from compressor to pool pad). I get serious air coming out the main drain with this set-up and I can have one hand on the air control and one on the appropriate pool system Jandy valve. Many have written that compressors don't have the volume to blow lines. My own experience says otherwise. The water explodes....and at only 25psi. High volume for the few seconds needed is no problem.

All the advice is well and good One thing I was hoping for is confirmation that you'll be lowering the water at least below the skimmer mouth - if you don't, for whatever reason, we can modify the blowing of the lines and adding antifreeze

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Well I went to close it today. The Shop Vac blew out everything fine except the main drain. I tried from the skimmer and from equipment pad it just didnt have enough power to do it.

So now i want to either buy a mighty vac thats made for blowing out the lines. But thats $400. Or does anyone know a good compressor I can buy that will be enough to do the job? Id want a nice mobile one. Ive seen some youtube video of a guy using a small one that he can carry and it blows the lines.

I can't help you with an inexpensive compressor or blower However, as I alluded to in my earlier response, you might not need one.

Here's the deal: Since you can't plug the line while it's blowing air, as long as you can force enough air into the line to get it below the frost line and close the valve to keep it there - your shop vac may well do that

Neither can I :!: Unless... I tie a string to the skimmer pole and lay it across the MD - then I gauge how much water has been forced out of the line (by how long the string has been moving) :idea:

While I can't give you a chart of "X seconds of movement = Y feet of vertical pipe blown", from blowing your other lines you should have a good idea of how quickly they purge. Take into account your 'frostline' (how deep the ground in your area will freeze in abnormally cold weather), and guess if you're below that level.

You can also leave the main drain for last. Once you are done with everything else, pour a gallon or two of anti-freeze into it from the pad, it will stay on top and protect down several feet of pipe. If the frost/freeze line is lower then the drain line, you're outta' luck.

Member

This is my first year owning a pool, so this will be my first closing. I have an IGP with 2 returns and 1 skimmer and live in the cold Northeast. I'm trying to read as much as I can about how to close it. I just want to make sure what I'm reading I'm comprehending. Before you blow out the lines, is there steps before this that should be done? Such as line disconnected from the filter, valve turned to skimmer or main drain, pump on or off? Then, to blow out the lines you put a shop vac hose into the skimmer and this should blow out any water in the returns? Do I do this with the pump on or off? Once this is done, where do I add in the antifreeze?

I own an air compressor that works great. I dont have any fancy connections. Its called ducktape! :lol:

You dont need a large air compressor to do it as long as the pressure is around 125-150' of pressure. I have an inground close to what you are desribing and even when I first purchased the house and had the PB close my pool, they decided to use my air compressor because it did a better job of forcing air into the lines.

You can buy these things at a Tractor Supply Co, Lowes, Menards, or Sears. If you go online, you can purchase them with 2 gallon tanks. That is what I have and it works perfectly. I attached a 100' hose to mine and use it for all sorts of things around the house.

Active member

Well i bought the craftsman and it did absolutly nothing. Barely the littlest bubbles came out of even the returns. Just couldnt keep up. Probably a 2HP or more might have done it but im not messing around getting more compressors. I ordered a mighty vac hopefully that works as advertised.

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New member

I was able to get the air out of main drain with a regular 6hp pancake air compressor . my drain is 8 feet deep. i connected the compressor to the pump basket, set output to 25psi and kept it running for about a minute..

Well-known member

I was able to get the air out of main drain with a regular 6hp pancake air compressor . my drain is 8 feet deep. i connected the compressor to the pump basket, set output to 25psi and kept it running for about a minute..

Did you mean 6hp or 6 gallon on your pancake compressor. I have a porter cable pancake compressor that has a 6 gallon capacity with a 3.5 SCFM at 40 psi, but when I looked up the specs on the motor the running horsepower is .8 HP. This leads me to believe you have A LOT more than what I'm considering a regular pancake compressor or you meant 6 Gallon?

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